JPH0296878A - Picture processor - Google Patents

Abstract

PURPOSE:To make do with a small capacity memory in a processing means by dividing input picture data into plural unit block data, and reading out only the unit block data necessary for picture processing to the memory, and synthesizing it with other unit block data after data-processing it. CONSTITUTION:The picture data is divided into plural unit block data by a dividing means 1 so that the picture of the input picture data is divided into plural unit pictures, and they are stored in a storage means 2. The processing means 3 is provided with the memory, and when it receives the instruction of data processing such as the correction, the enlargement, the reduction and the rotation, etc., of a picture, it reads out unit block data corresponding to the unit picture to be the object of processing from the storage means 2, and after performing the instructed data processing, writes and returns it to the storage means 2. A synthesizing means 4 reads out all the unit block data including the unit block data processed by the data processing for the picture processing stored in the storage means 2, and synthesizes them into one output picture data. Thus, the processing in the processing means 3 can be performed by using the memory of comparatively small capacity.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to an image processing device.

[Prior Art] Conventionally, in image processing devices, image data is stored as a single data block regardless of the amount of data.
When performing processing such as correction, enlargement, reduction, rotation, etc. of an image, all data is read out onto the memory of the CPU before the processing is performed. That is, as shown in FIG. 3, the input image data is stored in the storage means 2 as bar data in a fixed size, for example, in units of 256 bytes, starting from the beginning, and all of the stored image data is stored in the processing means (CP).
Processing was performed by reading the data into the memory of U)3.

[Problems to be Solved by the Invention] The conventional image processing device described above uses Omiya's CPU to store large-scale image data when performing processing such as retouching, enlarging, reducing, and rotating image data. The disadvantage is that it requires memory.

[Means for Solving the Problems] An image processing device of the present invention includes: a storage unit; and a storage unit that divides the image data into a plurality of unit block data so that the image of the given input image data is divided into a plurality of unit images. a dividing means for dividing the image into two and storing it in the storage means; and a memory, and upon receiving an instruction for data processing such as retouching, enlarging, reducing, rotating, etc., the image is stored in the memory as the target of the processing from the storage means. a processing unit that reads unit block data corresponding to a unit image, performs instructed data processing, and returns the data to the storage unit; and a unit that is stored in the storage unit and is subjected to data processing for the image processing. All 1' including block data
and composing means for reading the p-th block data and composing them into one output image data.

[Operation] Of the input image data divided into a plurality of unit block data, only the unit block data corresponding to the unit image to be subjected to image processing is read out to the processing means and the instructed data processing is performed. , processing within the processing means can be performed with a relatively small memory capacity.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the image processing apparatus of the present invention, and FIG. 2 is a diagram showing image data divided into +1 block data by the dividing means 1 of FIG. 1.

This image processing apparatus is composed of a dividing means 1, a storage means 2, a processing means 3, and a combining means 4.

The dividing means 1 inputs image data, and as shown in FIG. 2, if the input image data is 224 dots horizontally and 224 vertically, the image is divided into units represented by the image data of 64 horizontal dots and 64 vertical dots. When divided into images, one block corresponding to each unit image is 512 bytes (64 dots x 64
(dot) unit block data D,,D2,...
Divide into D16. At this time, D4. Da,
DI2. DI3. DI4. DI5. D
Since the unit block data of I8 is less than 512 bytes, the missing dots are compensated for by a dummy bit 0. The storage means 2 stores unit block data DI, D2 . . . . D16 is stored in the order in which it is divided from the first block of unit block data D1. The processing means 3 stores the storage means 2 in the internal memory.
The unit block data DI, D2.・・・
・The necessary unit block data of ,D,6 is read out, but the image data to be subjected to image processing is, for example, horizontal 19
From 3 dots to 256 bits (including dummies), vertical 6
When the number of dots is between 5 dots and 128 dots, if the unit block data to be read is the second, horizontal: x = 256 dots/64 dots, vertical: y = 128 dots/64 dots, then Z is calculated using the formula z= x + horizontal maximum number of blocks x (y-1>, x, y
By substituting the value of and the horizontal maximum block number=4, Z=4+4 (2-1)=8, and the eighth unit block data D, l is read out. The processing means 3 performs image modification, enlargement, reduction, and image correction on the unit block data (Da in this embodiment) read out to the memory.
The instructed data processing, such as rotation, is performed, and the processed unit block data D8 is stored in the storage unit 2 in the order in which it was stored. The synthesis means 4 receives from the storage means 2,
All unit block data D, D2, etc., including unit block data D8 that has undergone data processing necessary for image processing.
・Read +DI6 in the order in which they are stored, combine them into one image data, and output.

[Effects of the Invention] As explained above, the present invention divides input image data into a plurality of unit block data so that an image is divided into a plurality of unit images, and divides input image data into a plurality of unit block data necessary for image processing. By reading out only the data into the memory in the processing means and processing the data, and then combining it with other unit block data and output image data, the memory capacity in the processing means can be relatively small, making it possible to reduce the cost of the device. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the image processing apparatus of the present invention, FIG. 2 is a diagram showing image data divided into IQ block data by the dividing means 1 of FIG. 1, and FIG. 1 is a block diagram of a conventional example of a processing device. l...F stages of division, 2...Storage means, 3...Processing means, 4...Composition means, D,, D2. ..., D16... Unit block data.

Claims (1)

[Scope of Claims] 1. Storage means; and the image data is divided into a plurality of unit block data and stored in the storage means so that an image of given input image data is divided into a plurality of unit images. and a memory, upon receiving an instruction for data processing such as correction, enlargement, reduction, rotation, etc. of an image, unit block data corresponding to the unit image to be processed is stored in the memory from the storage means. processing means for reading, performing instructed data processing, and writing back to the storage means; and processing means for reading out, performing instructed data processing, and writing back to the storage means; and processing means for reading all unit block data including unit block data that has been subjected to data processing for the image processing and stored in the storage means. An image processing device comprising a composition means for reading and combining the data into one output image data.